Staff Sgt. Donald Gresham, 341st Security Forces Squadron base defense operations command controller, sets up a check point during a routine patrol April 2 at Malmstrom Air Force Base, Mont. While on patrol, Gresham and his partner Staff Sgt. Kyle Williams, 341st Missile Security Forces Squadron installation patrolman, enforce speed limits, check gate personnel and maintain installation security. (U.S. Air Force photo/Airman 1st Class Collin Schmidt)